Weber County Attorney Dee Smith is now calling the couple "persons of interest" after 36-year-old Eric Millerberg was sent back to prison Tuesday for violating his probation in a 2010 fraud case. Millerberg's wife, Dea Millerberg, remains jailed after being charged Oct. 7 with two prescription fraud felonies.

A telephone message for Eric Millerberg's attorney wasn't immediately returned Tuesday. It wasn't immediately clear if his wife had a lawyer.

Smith says police have suspects in the Rasmussen case, but he declined to elaborate.